How to Deploy Data-Centers with Cluster and Add ISCSI Storage in RHEV Environment

In this part, we are going to discuss how to deploy data-center with one cluster which contains our two hosts in the RHEV environment. Both of two hosts connected to shared storage, additional to previous preparation, we will add another CentOS6.6 virtual machine acts as storage node.

Create Data-Centers and Cluster in RHEV – Part 3

Data Center is a terminology describes the RHEV environment resources such as logical, network and storage resources.

Data Center consists of Clusters which include a set of node or nodes, which host virtual machines and its related snapshots, templates and pools. Storage domains are mandatory attached to Data Center to make it working effectively in enterprise environments. Multiple data centers in the same infrastructure could be managed separately by the same RHEVM portal.

Setting up storage is a prerequisite for a new data center because a data center cannot be initialized unless storage domains are attached and activated. For clustering features and enterprise deployment needs, its recommended to deploy shared-storage in your environment instead of host-based local storage.

In general, storage node will be accessible by Data Center hosts to create, store and snapshot virtual machines beside other important tasks.

Data Domain: used to hold the virtual hard disks and OVF files of all the virtual machines and templates in a data center. In addition, snapshots of the virtual machines are also stored in the data domain. You must attach a data domain to a data center before you can attach domains of other types to it.

ISO Domain: used to store ISO files which are needed to install and boot operating systems and applications for the virtual machines.

Export Domain: temporary storage repositories that are used to copy and move images between data centers in Red Hat Enterprise Virtualization environments.

In this part we are going to deploy Data Domain with following storage node specifications for our tutorial: